【正文】 s service braking system. The failure of a part of a hydraulic transmission system shall be signalled to the driver by a device prising a red warning signal,as specified in paragraph . Alternatively, the lighting up of this device when the fluid in the reservoir is below a certain level specified by the manufacturer shall be permitted.. Where use is made of energy other than the muscular energy of the driver,there need not be more than one source of such energy(hydraulic pump, air pressor, etc.), but the means by which the device constituting that source is driven must be as safe as practicable.. In the event of failure in any part of the transmission of a braking system, the feed to the part not affected by the failure must continue to be ensured if required for the purpose of halting the vehicle with the degree of effectiveness prescribed for residual and/or secondary condition must be met by means of devices which can be easily actuated when the vehicle is stationary,or by automatic means.. Furthermore, storage devices located downcircuit of this device must be such that in the case of a failure in the energy supply after four fullstroke actuations of the service brake control,under the conditions prescribed in paragraph . of annex 7 to this Regulation,it is still possible to halt the vehicle at the fifth application,with the degree of effectiveness prescribed for secondary braking.. However,for hydraulic braking systems with stored energy, these provisions can be considered to be met provided that the requirements of paragraph Part C of annex 7 to this Regulation, are satisfied.. The requirements of paragraphs ., . and this Regulation must be met without the use of any automatic device of a kind such that its ineffectiveness might pass unnoticed through the fact that parts normally in a position of rest e into action only in the event of failure in the braking system.. The service braking system shall act on all wheels of the vehicle and shall distribute its action appropriately among the axles.. In the case of vehicles with more than two axles,in order to avoid wheellocking or glazing of the brake linings, the brake force on certain axles may be reduced to zeroautomatically when carrying a much reduced load, provided that the vehicle meets all the performance requirements prescribed in annex 4 to this Regulation.. . Intrinsic variations in the braking system ( a result of changes in the electric state of charge in the traction batteries)are automatically pensated by appropriate variation in the phasing relationship as long as the requirements / of one of the following annexes to this Regulation are satisfied: In the case of M1 and N1 category vehicles with electric regenerative braking systems of category B,the braking input from other sources of braking, may be suitably phased to allow the electric regenerative braking system alone to beapplied, provided that both the following conditions are met: Annex 4,paragraph .,or Annex 13, paragraph . (including the case with the electric motor engaged). Wherever necessary, to ensure that braking rate 5/ remains related to the driver’s braking demand, having regard to the available tyre/road adhesion, braking shall automatically be caused to act on all wheels of the vehicle. The action of the service braking system shall be distributed between the wheel sof one and the same axle symmetrically in relation to the longitudinal median plane of the and functions, such as antilock, which may cause devia tions from this symmetrical distribution, shall be declared.. Compensation by the electric control transmission for deterioration or defect within the braking system shall be indicated to the driver by means of the yellow warning signal specified in paragraph . This requirement shall apply for all conditions of loading when pensation exceeds the following limits: . a difference in transverse braking pressures on any axle: (a)of 25 per cent of the higher value for vehicle decelerations $ 2m/sec2,(b)a value corresponding to 25 per cent at 2m/sec2 for decelerations below this rate.. an individual pensating value on any axle:(a)50 per cent of the nominal value for vehicle decelerations $ 2 m/s2,(b)a value corresponding to 50 per cent of the nominal value at 2m/s2 for decelerations below this rate.( （c）The Authority, which is to grant approval,shall have the right to check the service braking system by additional vehicle test procedures.. Compensation as defined above, is permitted only when the initial brake application is made at vehicle speeds greater than 10 km/h.. Malfunctions of the electric control transmission shall not apply the brakes contrary to the driver39。 these wheels must be so selected that the residual performance of the service braking system satisfies the requirements laid down in paragraph . of annex 4 to this Regulation.. However,the foregoing provisions shall not apply to tractor vehicles for semitrailers when the transmission of the semitrailer39。C?C‘On the stability in the of Lyapunov of a mbbcrtire vehicle’，Journal ofdynamics，Measurement，and Control，ASME， June 1976．[10] 王啟義機(jī)械制造裝備設(shè)計(jì)[M] 冶金工業(yè)出版社. [11] 王啟平,機(jī)床夾具設(shè)計(jì)[M].哈爾濱：哈爾濱工業(yè)大學(xué)出版社，.[12] [M].北京：機(jī)械工業(yè)出版社，～37，40～41.[13] 李青. 機(jī)械工程與自動(dòng)化[J]. 004(6).99101,103 .[14] 朱耀祥,[J].機(jī)械科 .[15] [J].機(jī)械工程學(xué).[16] 丁殿忠，[M].北京：機(jī)械工業(yè)出版社，.[17] [J].天津大學(xué)出版社， 2003(11).3840.[18] 閆志中,[J].內(nèi)蒙古林學(xué)院學(xué)報(bào). 致 謝畢業(yè)設(shè)計(jì)是大學(xué)階段的一門重要課程,是對(duì)大學(xué)期間所學(xué)知識(shí)的總結(jié)和升華,通過兩個(gè)多月的畢業(yè)設(shè)計(jì),我認(rèn)識(shí)到理論和實(shí)踐的統(tǒng)一性,知識(shí)要活學(xué)活用,要把學(xué)到的理論靈活的應(yīng)用到實(shí)踐中去,把知識(shí)變成物質(zhì)的東西,只有這樣學(xué)到的知識(shí)才是自己的,社會(huì)才會(huì)承認(rèn)知識(shí)的重要性.畢業(yè)設(shè)計(jì)既是檢驗(yàn)自己對(duì)所學(xué)的知識(shí)的應(yīng)用能力,又是一個(gè)體現(xiàn)團(tuán)結(jié)合作的過程,在畢業(yè)設(shè)計(jì)階段,從開始搜集資料到深入分析改進(jìn)工作的原理、結(jié)構(gòu)、功能,到提出初步的設(shè)計(jì)方案,直至最后完成, 石傳龍老師一直關(guān)注著我們的進(jìn)展,、嚴(yán)謹(jǐn)治學(xué)的態(tài)度,更收益于老師們的為人、,學(xué)生在這里表示衷心的感謝!系機(jī)房也免費(fèi)為我們畢業(yè)生計(jì)的同學(xué)開放,從老師那里我們得到的一種無形的力量,我們也得到了廣大同學(xué)的支持和幫助,如果沒有他們的幫助,我們肯能沒有這么順利就完成畢業(yè)設(shè)計(jì). 本次設(shè)計(jì)任務(wù)業(yè)已順利完成,但由于本人水平有限,缺乏經(jīng)驗(yàn),難免會(huì)留下一些遺憾,